drivers/scsi/fd_mcs.c

   1 /* fd_mcs.c -- Future Domain MCS 600/700 (or IBM OEM) driver
   2  *
   3  * FutureDomain MCS-600/700 v0.2 03/11/1998 by ZP Gu (zpg@castle.net)
   4  *
   5  * This driver is cloned from fdomain.* to specifically support
   6  * the Future Domain MCS 600/700 MCA SCSI adapters. Some PS/2s
   7  * also equipped with IBM Fast SCSI Adapter/A which is an OEM
   8  * of MCS 700.
   9  *
  10  * This driver also supports Reply SB16/SCSI card (the SCSI part).
  11  *
  12  * What makes this driver different is that this driver is MCA only
  13  * and it supports multiple adapters in the same system, IRQ
  14  * sharing, some driver statistics, and maps highest SCSI id to sda.
  15  * All cards are auto-detected.
  16  *
  17  * Assumptions: TMC-1800/18C50/18C30, BIOS >= 3.4
  18  *
  19  * LILO command-line options:
  20  *   fd_mcs=<FIFO_COUNT>[,<FIFO_SIZE>]
  21  *
  22  * ********************************************************
  23  * Please see Copyrights/Comments in fdomain.* for credits.
  24  * Following is from fdomain.c for acknowledgement:
  25  *
  26  * Created: Sun May  3 18:53:19 1992 by faith@cs.unc.edu
  27  * Revised: Wed Oct  2 11:10:55 1996 by r.faith@ieee.org
  28  * Author: Rickard E. Faith, faith@cs.unc.edu
  29  * Copyright 1992, 1993, 1994, 1995, 1996 Rickard E. Faith
  30  *
  31  * $Id: fdomain.c,v 5.45 1996/10/02 15:13:06 root Exp $
  32
  33  * This program is free software; you can redistribute it and/or modify it
  34  * under the terms of the GNU General Public License as published by the
  35  * Free Software Foundation; either version 2, or (at your option) any
  36  * later version.
  37
  38  * This program is distributed in the hope that it will be useful, but
  39  * WITHOUT ANY WARRANTY; without even the implied warranty of
  40  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  41  * General Public License for more details.
  42
  43  * You should have received a copy of the GNU General Public License along
  44  * with this program; if not, write to the Free Software Foundation, Inc.,
  45  * 675 Mass Ave, Cambridge, MA 02139, USA.
  46
  47  **************************************************************************
  48
  49  NOTES ON USER DEFINABLE OPTIONS:
  50
  51  DEBUG: This turns on the printing of various debug information.
  52
  53  ENABLE_PARITY: This turns on SCSI parity checking.  With the current
  54  driver, all attached devices must support SCSI parity.  If none of your
  55  devices support parity, then you can probably get the driver to work by
  56  turning this option off.  I have no way of testing this, however, and it
  57  would appear that no one ever uses this option.
  58
  59  FIFO_COUNT: The host adapter has an 8K cache (host adapters based on the
  60  18C30 chip have a 2k cache).  When this many 512 byte blocks are filled by
  61  the SCSI device, an interrupt will be raised.  Therefore, this could be as
  62  low as 0, or as high as 16.  Note, however, that values which are too high
  63  or too low seem to prevent any interrupts from occurring, and thereby lock
  64  up the machine.  I have found that 2 is a good number, but throughput may
  65  be increased by changing this value to values which are close to 2.
  66  Please let me know if you try any different values.
  67  [*****Now a runtime option*****]
  68
  69  RESELECTION: This is no longer an option, since I gave up trying to
  70  implement it in version 4.x of this driver.  It did not improve
  71  performance at all and made the driver unstable (because I never found one
  72  of the two race conditions which were introduced by the multiple
  73  outstanding command code).  The instability seems a very high price to pay
  74  just so that you don't have to wait for the tape to rewind.  If you want
  75  this feature implemented, send me patches.  I'll be happy to send a copy
  76  of my (broken) driver to anyone who would like to see a copy.
  77
  78  **************************************************************************/
  79
  80 #include <linux/module.h>
  81 #include <linux/init.h>
  82 #include <linux/interrupt.h>
  83 #include <linux/blkdev.h>
  84 #include <linux/errno.h>
  85 #include <linux/string.h>
  86 #include <linux/ioport.h>
  87 #include <linux/proc_fs.h>
  88 #include <linux/delay.h>
  89 #include <linux/mca.h>
  90 #include <linux/spinlock.h>
  91 #include <scsi/scsicam.h>
  92 #include <linux/mca-legacy.h>
  93
  94 #include <asm/io.h>
  95 #include <asm/system.h>
  96
  97 #include "scsi.h"
  98 #include <scsi/scsi_host.h>
  99
 100 #define DRIVER_VERSION "v0.2 by ZP Gu<zpg@castle.net>"
 101
 102 /* START OF USER DEFINABLE OPTIONS */
 103
 104 #define DEBUG            0      /* Enable debugging output */
 105 #define ENABLE_PARITY    1      /* Enable SCSI Parity */
 106
 107 /* END OF USER DEFINABLE OPTIONS */
 108
 109 #if DEBUG
 110 #define EVERY_ACCESS     0      /* Write a line on every scsi access */
 111 #define ERRORS_ONLY      1      /* Only write a line if there is an error */
 112 #define DEBUG_MESSAGES   1      /* Debug MESSAGE IN phase */
 113 #define DEBUG_ABORT      1      /* Debug abort() routine */
 114 #define DEBUG_RESET      1      /* Debug reset() routine */
 115 #define DEBUG_RACE       1      /* Debug interrupt-driven race condition */
 116 #else
 117 #define EVERY_ACCESS     0      /* LEAVE THESE ALONE--CHANGE THE ONES ABOVE */
 118 #define ERRORS_ONLY      0
 119 #define DEBUG_MESSAGES   0
 120 #define DEBUG_ABORT      0
 121 #define DEBUG_RESET      0
 122 #define DEBUG_RACE       0
 123 #endif
 124
 125 /* Errors are reported on the line, so we don't need to report them again */
 126 #if EVERY_ACCESS
 127 #undef ERRORS_ONLY
 128 #define ERRORS_ONLY      0
 129 #endif
 130
 131 #if ENABLE_PARITY
 132 #define PARITY_MASK      0x08
 133 #else
 134 #define PARITY_MASK      0x00
 135 #endif
 136
 137 enum chip_type {
 138         unknown = 0x00,
 139         tmc1800 = 0x01,
 140         tmc18c50 = 0x02,
 141         tmc18c30 = 0x03,
 142 };
 143
 144 enum {
 145         in_arbitration = 0x02,
 146         in_selection = 0x04,
 147         in_other = 0x08,
 148         disconnect = 0x10,
 149         aborted = 0x20,
 150         sent_ident = 0x40,
 151 };
 152
 153 enum in_port_type {
 154         Read_SCSI_Data = 0,
 155         SCSI_Status = 1,
 156         TMC_Status = 2,
 157         FIFO_Status = 3,        /* tmc18c50/tmc18c30 only */
 158         Interrupt_Cond = 4,     /* tmc18c50/tmc18c30 only */
 159         LSB_ID_Code = 5,
 160         MSB_ID_Code = 6,
 161         Read_Loopback = 7,
 162         SCSI_Data_NoACK = 8,
 163         Interrupt_Status = 9,
 164         Configuration1 = 10,
 165         Configuration2 = 11,    /* tmc18c50/tmc18c30 only */
 166         Read_FIFO = 12,
 167         FIFO_Data_Count = 14
 168 };
 169
 170 enum out_port_type {
 171         Write_SCSI_Data = 0,
 172         SCSI_Cntl = 1,
 173         Interrupt_Cntl = 2,
 174         SCSI_Mode_Cntl = 3,
 175         TMC_Cntl = 4,
 176         Memory_Cntl = 5,        /* tmc18c50/tmc18c30 only */
 177         Write_Loopback = 7,
 178         IO_Control = 11,        /* tmc18c30 only */
 179         Write_FIFO = 12
 180 };
 181
 182 struct fd_hostdata {
 183         unsigned long _bios_base;
 184         int _bios_major;
 185         int _bios_minor;
 186         volatile int _in_command;
 187         Scsi_Cmnd *_current_SC;
 188         enum chip_type _chip;
 189         int _adapter_mask;
 190         int _fifo_count;        /* Number of 512 byte blocks before INTR */
 191
 192         char _adapter_name[64];
 193 #if DEBUG_RACE
 194         volatile int _in_interrupt_flag;
 195 #endif
 196
 197         int _SCSI_Mode_Cntl_port;
 198         int _FIFO_Data_Count_port;
 199         int _Interrupt_Cntl_port;
 200         int _Interrupt_Status_port;
 201         int _Interrupt_Cond_port;
 202         int _Read_FIFO_port;
 203         int _Read_SCSI_Data_port;
 204         int _SCSI_Cntl_port;
 205         int _SCSI_Data_NoACK_port;
 206         int _SCSI_Status_port;
 207         int _TMC_Cntl_port;
 208         int _TMC_Status_port;
 209         int _Write_FIFO_port;
 210         int _Write_SCSI_Data_port;
 211
 212         int _FIFO_Size;         /* = 0x2000;  8k FIFO for
 213                                    pre-tmc18c30 chips */
 214         /* simple stats */
 215         int _Bytes_Read;
 216         int _Bytes_Written;
 217         int _INTR_Processed;
 218 };
 219
 220 #define FD_MAX_HOSTS 3          /* enough? */
 221
 222 #define HOSTDATA(shpnt) ((struct fd_hostdata *) shpnt->hostdata)
 223 #define bios_base             (HOSTDATA(shpnt)->_bios_base)
 224 #define bios_major            (HOSTDATA(shpnt)->_bios_major)
 225 #define bios_minor            (HOSTDATA(shpnt)->_bios_minor)
 226 #define in_command            (HOSTDATA(shpnt)->_in_command)
 227 #define current_SC            (HOSTDATA(shpnt)->_current_SC)
 228 #define chip                  (HOSTDATA(shpnt)->_chip)
 229 #define adapter_mask          (HOSTDATA(shpnt)->_adapter_mask)
 230 #define FIFO_COUNT            (HOSTDATA(shpnt)->_fifo_count)
 231 #define adapter_name          (HOSTDATA(shpnt)->_adapter_name)
 232 #if DEBUG_RACE
 233 #define in_interrupt_flag     (HOSTDATA(shpnt)->_in_interrupt_flag)
 234 #endif
 235 #define SCSI_Mode_Cntl_port   (HOSTDATA(shpnt)->_SCSI_Mode_Cntl_port)
 236 #define FIFO_Data_Count_port  (HOSTDATA(shpnt)->_FIFO_Data_Count_port)
 237 #define Interrupt_Cntl_port   (HOSTDATA(shpnt)->_Interrupt_Cntl_port)
 238 #define Interrupt_Status_port (HOSTDATA(shpnt)->_Interrupt_Status_port)
 239 #define Interrupt_Cond_port   (HOSTDATA(shpnt)->_Interrupt_Cond_port)
 240 #define Read_FIFO_port        (HOSTDATA(shpnt)->_Read_FIFO_port)
 241 #define Read_SCSI_Data_port   (HOSTDATA(shpnt)->_Read_SCSI_Data_port)
 242 #define SCSI_Cntl_port        (HOSTDATA(shpnt)->_SCSI_Cntl_port)
 243 #define SCSI_Data_NoACK_port  (HOSTDATA(shpnt)->_SCSI_Data_NoACK_port)
 244 #define SCSI_Status_port      (HOSTDATA(shpnt)->_SCSI_Status_port)
 245 #define TMC_Cntl_port         (HOSTDATA(shpnt)->_TMC_Cntl_port)
 246 #define TMC_Status_port       (HOSTDATA(shpnt)->_TMC_Status_port)
 247 #define Write_FIFO_port       (HOSTDATA(shpnt)->_Write_FIFO_port)
 248 #define Write_SCSI_Data_port  (HOSTDATA(shpnt)->_Write_SCSI_Data_port)
 249 #define FIFO_Size             (HOSTDATA(shpnt)->_FIFO_Size)
 250 #define Bytes_Read            (HOSTDATA(shpnt)->_Bytes_Read)
 251 #define Bytes_Written         (HOSTDATA(shpnt)->_Bytes_Written)
 252 #define INTR_Processed        (HOSTDATA(shpnt)->_INTR_Processed)
 253
 254 struct fd_mcs_adapters_struct {
 255         char *name;
 256         int id;
 257         enum chip_type fd_chip;
 258         int fifo_size;
 259         int fifo_count;
 260 };
 261
 262 #define REPLY_ID 0x5137
 263
 264 static struct fd_mcs_adapters_struct fd_mcs_adapters[] = {
 265         {"Future Domain SCSI Adapter MCS-700(18C50)",
 266          0x60e9,
 267          tmc18c50,
 268          0x2000,
 269          4},
 270         {"Future Domain SCSI Adapter MCS-600/700(TMC-1800)",
 271          0x6127,
 272          tmc1800,
 273          0x2000,
 274          4},
 275         {"Reply Sound Blaster/SCSI Adapter",
 276          REPLY_ID,
 277          tmc18c30,
 278          0x800,
 279          2},
 280 };
 281
 282 #define FD_BRDS sizeof(fd_mcs_adapters)/sizeof(struct fd_mcs_adapters_struct)
 283
 284 static irqreturn_t fd_mcs_intr(int irq, void *dev_id, struct pt_regs *regs);
 285
 286 static unsigned long addresses[] = { 0xc8000, 0xca000, 0xce000, 0xde000 };
 287 static unsigned short ports[] = { 0x140, 0x150, 0x160, 0x170 };
 288 static unsigned short interrupts[] = { 3, 5, 10, 11, 12, 14, 15, 0 };
 289
 290 /* host information */
 291 static int found = 0;
 292 static struct Scsi_Host *hosts[FD_MAX_HOSTS + 1] = { NULL };
 293
 294 static int user_fifo_count = 0;
 295 static int user_fifo_size = 0;
 296
 297 static int __init fd_mcs_setup(char *str)
 298 {
 299         static int done_setup = 0;
 300         int ints[3];
 301
 302         get_options(str, 3, ints);
 303         if (done_setup++ || ints[0] < 1 || ints[0] > 2 || ints[1] < 1 || ints[1] > 16) {
 304                 printk("fd_mcs: usage: fd_mcs=FIFO_COUNT, FIFO_SIZE\n");
 305                 return 0;
 306         }
 307
 308         user_fifo_count = ints[0] >= 1 ? ints[1] : 0;
 309         user_fifo_size = ints[0] >= 2 ? ints[2] : 0;
 310         return 1;
 311 }
 312
 313 __setup("fd_mcs=", fd_mcs_setup);
 314
 315 static void print_banner(struct Scsi_Host *shpnt)
 316 {
 317         printk("scsi%d <fd_mcs>: ", shpnt->host_no);
 318
 319         if (bios_base) {
 320                 printk("BIOS at 0x%lX", bios_base);
 321         } else {
 322                 printk("No BIOS");
 323         }
 324
 325         printk(", HostID %d, %s Chip, IRQ %d, IO 0x%lX\n", shpnt->this_id, chip == tmc18c50 ? "TMC-18C50" : (chip == tmc18c30 ? "TMC-18C30" : (chip == tmc1800 ? "TMC-1800" : "Unknown")), shpnt->irq, shpnt->io_port);
 326 }
 327
 328
 329 static void do_pause(unsigned amount)
 330 {                               /* Pause for amount*10 milliseconds */
 331         do {
 332                 mdelay(10);
 333         } while (--amount);
 334 }
 335
 336 static void fd_mcs_make_bus_idle(struct Scsi_Host *shpnt)
 337 {
 338         outb(0, SCSI_Cntl_port);
 339         outb(0, SCSI_Mode_Cntl_port);
 340         if (chip == tmc18c50 || chip == tmc18c30)
 341                 outb(0x21 | PARITY_MASK, TMC_Cntl_port);        /* Clear forced intr. */
 342         else
 343                 outb(0x01 | PARITY_MASK, TMC_Cntl_port);
 344 }
 345
 346 static int fd_mcs_detect(Scsi_Host_Template * tpnt)
 347 {
 348         int loop;
 349         struct Scsi_Host *shpnt;
 350
 351         /* get id, port, bios, irq */
 352         int slot;
 353         u_char pos2, pos3, pos4;
 354         int id, port, irq;
 355         unsigned long bios;
 356
 357         /* if not MCA machine, return */
 358         if (!MCA_bus)
 359                 return 0;
 360
 361         /* changeable? */
 362         id = 7;
 363
 364         for (loop = 0; loop < FD_BRDS; loop++) {
 365                 slot = 0;
 366                 while (MCA_NOTFOUND != (slot = mca_find_adapter(fd_mcs_adapters[loop].id, slot))) {
 367
 368                         /* if we get this far, an adapter has been detected and is
 369                            enabled */
 370
 371                         printk(KERN_INFO "scsi  <fd_mcs>: %s at slot %d\n", fd_mcs_adapters[loop].name, slot + 1);
 372
 373                         pos2 = mca_read_stored_pos(slot, 2);
 374                         pos3 = mca_read_stored_pos(slot, 3);
 375                         pos4 = mca_read_stored_pos(slot, 4);
 376
 377                         /* ready for next probe */
 378                         slot++;
 379
 380                         if (fd_mcs_adapters[loop].id == REPLY_ID) {     /* reply card */
 381                                 static int reply_irq[] = { 10, 11, 14, 15 };
 382
 383                                 bios = 0;       /* no bios */
 384
 385                                 if (pos2 & 0x2)
 386                                         port = ports[pos4 & 0x3];
 387                                 else
 388                                         continue;
 389
 390                                 /* can't really disable it, same as irq=10 */
 391                                 irq = reply_irq[((pos4 >> 2) & 0x1) + 2 * ((pos4 >> 4) & 0x1)];
 392                         } else {
 393                                 bios = addresses[pos2 >> 6];
 394                                 port = ports[(pos2 >> 4) & 0x03];
 395                                 irq = interrupts[(pos2 >> 1) & 0x07];
 396                         }
 397
 398                         if (irq) {
 399                                 /* claim the slot */
 400                                 mca_set_adapter_name(slot - 1, fd_mcs_adapters[loop].name);
 401
 402                                 /* check irq/region */
 403                                 if (request_irq(irq, fd_mcs_intr, SA_SHIRQ, "fd_mcs", hosts)) {
 404                                         printk(KERN_ERR "fd_mcs: interrupt is not available, skipping...\n");
 405                                         continue;
 406                                 }
 407
 408                                 /* request I/O region */
 409                                 if (request_region(port, 0x10, "fd_mcs")) {
 410                                         printk(KERN_ERR "fd_mcs: I/O region is already in use, skipping...\n");
 411                                         continue;
 412                                 }
 413                                 /* register */
 414                                 if (!(shpnt = scsi_register(tpnt, sizeof(struct fd_hostdata)))) {
 415                                         printk(KERN_ERR "fd_mcs: scsi_register() failed\n");
 416                                         release_region(port, 0x10);
 417                                         free_irq(irq, hosts);
 418                                         continue;
 419                                 }
 420
 421
 422                                 /* save name */
 423                                 strcpy(adapter_name, fd_mcs_adapters[loop].name);
 424
 425                                 /* chip/fifo */
 426                                 chip = fd_mcs_adapters[loop].fd_chip;
 427                                 /* use boot time value if available */
 428                                 FIFO_COUNT = user_fifo_count ? user_fifo_count : fd_mcs_adapters[loop].fifo_count;
 429                                 FIFO_Size = user_fifo_size ? user_fifo_size : fd_mcs_adapters[loop].fifo_size;
 430
 431 /* FIXME: Do we need to keep this bit of code inside NOT_USED around at all? */
 432 #ifdef NOT_USED
 433                                 /* *************************************************** */
 434                                 /* Try to toggle 32-bit mode.  This only
 435                                    works on an 18c30 chip.  (User reports
 436                                    say this works, so we should switch to
 437                                    it in the near future.) */
 438                                 outb(0x80, port + IO_Control);
 439                                 if ((inb(port + Configuration2) & 0x80) == 0x80) {
 440                                         outb(0x00, port + IO_Control);
 441                                         if ((inb(port + Configuration2) & 0x80) == 0x00) {
 442                                                 chip = tmc18c30;
 443                                                 FIFO_Size = 0x800;      /* 2k FIFO */
 444
 445                                                 printk("FIRST: chip=%s, fifo_size=0x%x\n", (chip == tmc18c30) ? "tmc18c30" : "tmc18c50", FIFO_Size);
 446                                         }
 447                                 }
 448
 449                                 /* That should have worked, but appears to
 450                                    have problems.  Let's assume it is an
 451                                    18c30 if the RAM is disabled. */
 452
 453                                 if (inb(port + Configuration2) & 0x02) {
 454                                         chip = tmc18c30;
 455                                         FIFO_Size = 0x800;      /* 2k FIFO */
 456
 457                                         printk("SECOND: chip=%s, fifo_size=0x%x\n", (chip == tmc18c30) ? "tmc18c30" : "tmc18c50", FIFO_Size);
 458                                 }
 459                                 /* *************************************************** */
 460 #endif
 461
 462                                 /* IBM/ANSI scsi scan ordering */
 463                                 /* Stick this back in when the scsi.c changes are there */
 464                                 shpnt->reverse_ordering = 1;
 465
 466
 467                                 /* saving info */
 468                                 hosts[found++] = shpnt;
 469
 470                                 shpnt->this_id = id;
 471                                 shpnt->irq = irq;
 472                                 shpnt->io_port = port;
 473                                 shpnt->n_io_port = 0x10;
 474
 475                                 /* save */
 476                                 bios_base = bios;
 477                                 adapter_mask = (1 << id);
 478
 479                                 /* save more */
 480                                 SCSI_Mode_Cntl_port = port + SCSI_Mode_Cntl;
 481                                 FIFO_Data_Count_port = port + FIFO_Data_Count;
 482                                 Interrupt_Cntl_port = port + Interrupt_Cntl;
 483                                 Interrupt_Status_port = port + Interrupt_Status;
 484                                 Interrupt_Cond_port = port + Interrupt_Cond;
 485                                 Read_FIFO_port = port + Read_FIFO;
 486                                 Read_SCSI_Data_port = port + Read_SCSI_Data;
 487                                 SCSI_Cntl_port = port + SCSI_Cntl;
 488                                 SCSI_Data_NoACK_port = port + SCSI_Data_NoACK;
 489                                 SCSI_Status_port = port + SCSI_Status;
 490                                 TMC_Cntl_port = port + TMC_Cntl;
 491                                 TMC_Status_port = port + TMC_Status;
 492                                 Write_FIFO_port = port + Write_FIFO;
 493                                 Write_SCSI_Data_port = port + Write_SCSI_Data;
 494
 495                                 Bytes_Read = 0;
 496                                 Bytes_Written = 0;
 497                                 INTR_Processed = 0;
 498
 499                                 /* say something */
 500                                 print_banner(shpnt);
 501
 502                                 /* reset */
 503                                 outb(1, SCSI_Cntl_port);
 504                                 do_pause(2);
 505                                 outb(0, SCSI_Cntl_port);
 506                                 do_pause(115);
 507                                 outb(0, SCSI_Mode_Cntl_port);
 508                                 outb(PARITY_MASK, TMC_Cntl_port);
 509                                 /* done reset */
 510                         }
 511                 }
 512
 513                 if (found == FD_MAX_HOSTS) {
 514                         printk("fd_mcs: detecting reached max=%d host adapters.\n", FD_MAX_HOSTS);
 515                         break;
 516                 }
 517         }
 518
 519         return found;
 520 }
 521
 522 static const char *fd_mcs_info(struct Scsi_Host *shpnt)
 523 {
 524         return adapter_name;
 525 }
 526
 527 static int TOTAL_INTR = 0;
 528
 529 /*
 530  * inout : decides on the direction of the dataflow and the meaning of the
 531  *         variables
 532  * buffer: If inout==FALSE data is being written to it else read from it
 533  * *start: If inout==FALSE start of the valid data in the buffer
 534  * offset: If inout==FALSE offset from the beginning of the imaginary file
 535  *         from which we start writing into the buffer
 536  * length: If inout==FALSE max number of bytes to be written into the buffer
 537  *         else number of bytes in the buffer
 538  */
 539 static int fd_mcs_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset, int length, int inout)
 540 {
 541         int len = 0;
 542
 543         if (inout)
 544                 return (-ENOSYS);
 545
 546         *start = buffer + offset;
 547
 548         len += sprintf(buffer + len, "Future Domain MCS-600/700 Driver %s\n", DRIVER_VERSION);
 549         len += sprintf(buffer + len, "HOST #%d: %s\n", shpnt->host_no, adapter_name);
 550         len += sprintf(buffer + len, "FIFO Size=0x%x, FIFO Count=%d\n", FIFO_Size, FIFO_COUNT);
 551         len += sprintf(buffer + len, "DriverCalls=%d, Interrupts=%d, BytesRead=%d, BytesWrite=%d\n\n", TOTAL_INTR, INTR_Processed, Bytes_Read, Bytes_Written);
 552
 553         if ((len -= offset) <= 0)
 554                 return 0;
 555         if (len > length)
 556                 len = length;
 557         return len;
 558 }
 559
 560 static int fd_mcs_select(struct Scsi_Host *shpnt, int target)
 561 {
 562         int status;
 563         unsigned long timeout;
 564
 565         outb(0x82, SCSI_Cntl_port);     /* Bus Enable + Select */
 566         outb(adapter_mask | (1 << target), SCSI_Data_NoACK_port);
 567
 568         /* Stop arbitration and enable parity */
 569         outb(PARITY_MASK, TMC_Cntl_port);
 570
 571         timeout = 350;          /* 350mS -- because of timeouts
 572                                    (was 250mS) */
 573
 574         do {
 575                 status = inb(SCSI_Status_port); /* Read adapter status */
 576                 if (status & 1) {       /* Busy asserted */
 577                         /* Enable SCSI Bus (on error, should make bus idle with 0) */
 578                         outb(0x80, SCSI_Cntl_port);
 579                         return 0;
 580                 }
 581                 udelay(1000);   /* wait one msec */
 582         } while (--timeout);
 583
 584         /* Make bus idle */
 585         fd_mcs_make_bus_idle(shpnt);
 586 #if EVERY_ACCESS
 587         if (!target)
 588                 printk("Selection failed\n");
 589 #endif
 590 #if ERRORS_ONLY
 591         if (!target) {
 592                 static int flag = 0;
 593
 594                 if (!flag)      /* Skip first failure for all chips. */
 595                         ++flag;
 596                 else
 597                         printk("fd_mcs: Selection failed\n");
 598         }
 599 #endif
 600         return 1;
 601 }
 602
 603 static void my_done(struct Scsi_Host *shpnt, int error)
 604 {
 605         if (in_command) {
 606                 in_command = 0;
 607                 outb(0x00, Interrupt_Cntl_port);
 608                 fd_mcs_make_bus_idle(shpnt);
 609                 current_SC->result = error;
 610                 current_SC->scsi_done(current_SC);
 611         } else {
 612                 panic("fd_mcs: my_done() called outside of command\n");
 613         }
 614 #if DEBUG_RACE
 615         in_interrupt_flag = 0;
 616 #endif
 617 }
 618
 619 /* only my_done needs to be protected  */
 620 static irqreturn_t fd_mcs_intr(int irq, void *dev_id, struct pt_regs *regs)
 621 {
 622         unsigned long flags;
 623         int status;
 624         int done = 0;
 625         unsigned data_count, tmp_count;
 626
 627         int i = 0;
 628         struct Scsi_Host *shpnt;
 629
 630         TOTAL_INTR++;
 631
 632         /* search for one adapter-response on shared interrupt */
 633         while ((shpnt = hosts[i++])) {
 634                 if ((inb(TMC_Status_port)) & 1)
 635                         break;
 636         }
 637
 638         /* return if some other device on this IRQ caused the interrupt */
 639         if (!shpnt) {
 640                 return IRQ_NONE;
 641         }
 642
 643         INTR_Processed++;
 644
 645         outb(0x00, Interrupt_Cntl_port);
 646
 647         /* Abort calls my_done, so we do nothing here. */
 648         if (current_SC->SCp.phase & aborted) {
 649 #if DEBUG_ABORT
 650                 printk("Interrupt after abort, ignoring\n");
 651 #endif
 652                 /* return IRQ_HANDLED; */
 653         }
 654 #if DEBUG_RACE
 655         ++in_interrupt_flag;
 656 #endif
 657
 658         if (current_SC->SCp.phase & in_arbitration) {
 659                 status = inb(TMC_Status_port);  /* Read adapter status */
 660                 if (!(status & 0x02)) {
 661 #if EVERY_ACCESS
 662                         printk(" AFAIL ");
 663 #endif
 664                         spin_lock_irqsave(shpnt->host_lock, flags);
 665                         my_done(shpnt, DID_BUS_BUSY << 16);
 666                         spin_unlock_irqrestore(shpnt->host_lock, flags);
 667                         return IRQ_HANDLED;
 668                 }
 669                 current_SC->SCp.phase = in_selection;
 670
 671                 outb(0x40 | FIFO_COUNT, Interrupt_Cntl_port);
 672
 673                 outb(0x82, SCSI_Cntl_port);     /* Bus Enable + Select */
 674                 outb(adapter_mask | (1 << current_SC->device->id), SCSI_Data_NoACK_port);
 675
 676                 /* Stop arbitration and enable parity */
 677                 outb(0x10 | PARITY_MASK, TMC_Cntl_port);
 678 #if DEBUG_RACE
 679                 in_interrupt_flag = 0;
 680 #endif
 681                 return IRQ_HANDLED;
 682         } else if (current_SC->SCp.phase & in_selection) {
 683                 status = inb(SCSI_Status_port);
 684                 if (!(status & 0x01)) {
 685                         /* Try again, for slow devices */
 686                         if (fd_mcs_select(shpnt, current_SC->device->id)) {
 687 #if EVERY_ACCESS
 688                                 printk(" SFAIL ");
 689 #endif
 690                                 spin_lock_irqsave(shpnt->host_lock, flags);
 691                                 my_done(shpnt, DID_NO_CONNECT << 16);
 692                                 spin_unlock_irqrestore(shpnt->host_lock, flags);
 693                                 return IRQ_HANDLED;
 694                         } else {
 695 #if EVERY_ACCESS
 696                                 printk(" AltSel ");
 697 #endif
 698                                 /* Stop arbitration and enable parity */
 699                                 outb(0x10 | PARITY_MASK, TMC_Cntl_port);
 700                         }
 701                 }
 702                 current_SC->SCp.phase = in_other;
 703                 outb(0x90 | FIFO_COUNT, Interrupt_Cntl_port);
 704                 outb(0x80, SCSI_Cntl_port);
 705 #if DEBUG_RACE
 706                 in_interrupt_flag = 0;
 707 #endif
 708                 return IRQ_HANDLED;
 709         }
 710
 711         /* current_SC->SCp.phase == in_other: this is the body of the routine */
 712
 713         status = inb(SCSI_Status_port);
 714
 715         if (status & 0x10) {    /* REQ */
 716
 717                 switch (status & 0x0e) {
 718
 719                 case 0x08:      /* COMMAND OUT */
 720                         outb(current_SC->cmnd[current_SC->SCp.sent_command++], Write_SCSI_Data_port);
 721 #if EVERY_ACCESS
 722                         printk("CMD = %x,", current_SC->cmnd[current_SC->SCp.sent_command - 1]);
 723 #endif
 724                         break;
 725                 case 0x00:      /* DATA OUT -- tmc18c50/tmc18c30 only */
 726                         if (chip != tmc1800 && !current_SC->SCp.have_data_in) {
 727                                 current_SC->SCp.have_data_in = -1;
 728                                 outb(0xd0 | PARITY_MASK, TMC_Cntl_port);
 729                         }
 730                         break;
 731                 case 0x04:      /* DATA IN -- tmc18c50/tmc18c30 only */
 732                         if (chip != tmc1800 && !current_SC->SCp.have_data_in) {
 733                                 current_SC->SCp.have_data_in = 1;
 734                                 outb(0x90 | PARITY_MASK, TMC_Cntl_port);
 735                         }
 736                         break;
 737                 case 0x0c:      /* STATUS IN */
 738                         current_SC->SCp.Status = inb(Read_SCSI_Data_port);
 739 #if EVERY_ACCESS
 740                         printk("Status = %x, ", current_SC->SCp.Status);
 741 #endif
 742 #if ERRORS_ONLY
 743                         if (current_SC->SCp.Status && current_SC->SCp.Status != 2 && current_SC->SCp.Status != 8) {
 744                                 printk("ERROR fd_mcs: target = %d, command = %x, status = %x\n", current_SC->device->id, current_SC->cmnd[0], current_SC->SCp.Status);
 745                         }
 746 #endif
 747                         break;
 748                 case 0x0a:      /* MESSAGE OUT */
 749                         outb(MESSAGE_REJECT, Write_SCSI_Data_port);     /* Reject */
 750                         break;
 751                 case 0x0e:      /* MESSAGE IN */
 752                         current_SC->SCp.Message = inb(Read_SCSI_Data_port);
 753 #if EVERY_ACCESS
 754                         printk("Message = %x, ", current_SC->SCp.Message);
 755 #endif
 756                         if (!current_SC->SCp.Message)
 757                                 ++done;
 758 #if DEBUG_MESSAGES || EVERY_ACCESS
 759                         if (current_SC->SCp.Message) {
 760                                 printk("fd_mcs: message = %x\n", current_SC->SCp.Message);
 761                         }
 762 #endif
 763                         break;
 764                 }
 765         }
 766
 767         if (chip == tmc1800 && !current_SC->SCp.have_data_in && (current_SC->SCp.sent_command >= current_SC->cmd_len)) {
 768                 /* We have to get the FIFO direction
 769                    correct, so I've made a table based
 770                    on the SCSI Standard of which commands
 771                    appear to require a DATA OUT phase.
 772                  */
 773                 /*
 774                    p. 94: Command for all device types
 775                    CHANGE DEFINITION            40 DATA OUT
 776                    COMPARE                      39 DATA OUT
 777                    COPY                         18 DATA OUT
 778                    COPY AND VERIFY              3a DATA OUT
 779                    INQUIRY                      12
 780                    LOG SELECT                   4c DATA OUT
 781                    LOG SENSE                    4d
 782                    MODE SELECT (6)              15 DATA OUT
 783                    MODE SELECT (10)             55 DATA OUT
 784                    MODE SENSE (6)               1a
 785                    MODE SENSE (10)              5a
 786                    READ BUFFER                  3c
 787                    RECEIVE DIAGNOSTIC RESULTS   1c
 788                    REQUEST SENSE                03
 789                    SEND DIAGNOSTIC              1d DATA OUT
 790                    TEST UNIT READY              00
 791                    WRITE BUFFER                 3b DATA OUT
 792
 793                    p.178: Commands for direct-access devices (not listed on p. 94)
 794                    FORMAT UNIT                  04 DATA OUT
 795                    LOCK-UNLOCK CACHE            36
 796                    PRE-FETCH                    34
 797                    PREVENT-ALLOW MEDIUM REMOVAL 1e
 798                    READ (6)/RECEIVE             08
 799                    READ (10)                    3c
 800                    READ CAPACITY                25
 801                    READ DEFECT DATA (10)        37
 802                    READ LONG                    3e
 803                    REASSIGN BLOCKS              07 DATA OUT
 804                    RELEASE                      17
 805                    RESERVE                      16 DATA OUT
 806                    REZERO UNIT/REWIND           01
 807                    SEARCH DATA EQUAL (10)       31 DATA OUT
 808                    SEARCH DATA HIGH (10)        30 DATA OUT
 809                    SEARCH DATA LOW (10)         32 DATA OUT
 810                    SEEK (6)                     0b
 811                    SEEK (10)                    2b
 812                    SET LIMITS (10)              33
 813                    START STOP UNIT              1b
 814                    SYNCHRONIZE CACHE            35
 815                    VERIFY (10)                  2f
 816                    WRITE (6)/PRINT/SEND         0a DATA OUT
 817                    WRITE (10)/SEND              2a DATA OUT
 818                    WRITE AND VERIFY (10)        2e DATA OUT
 819                    WRITE LONG                   3f DATA OUT
 820                    WRITE SAME                   41 DATA OUT ?
 821
 822                    p. 261: Commands for sequential-access devices (not previously listed)
 823                    ERASE                        19
 824                    LOAD UNLOAD                  1b
 825                    LOCATE                       2b
 826                    READ BLOCK LIMITS            05
 827                    READ POSITION                34
 828                    READ REVERSE                 0f
 829                    RECOVER BUFFERED DATA        14
 830                    SPACE                        11
 831                    WRITE FILEMARKS              10 ?
 832
 833                    p. 298: Commands for printer devices (not previously listed)
 834                    ****** NOT SUPPORTED BY THIS DRIVER, since 0b is SEEK (6) *****
 835                    SLEW AND PRINT               0b DATA OUT  -- same as seek
 836                    STOP PRINT                   1b
 837                    SYNCHRONIZE BUFFER           10
 838
 839                    p. 315: Commands for processor devices (not previously listed)
 840
 841                    p. 321: Commands for write-once devices (not previously listed)
 842                    MEDIUM SCAN                  38
 843                    READ (12)                    a8
 844                    SEARCH DATA EQUAL (12)       b1 DATA OUT
 845                    SEARCH DATA HIGH (12)        b0 DATA OUT
 846                    SEARCH DATA LOW (12)         b2 DATA OUT
 847                    SET LIMITS (12)              b3
 848                    VERIFY (12)                  af
 849                    WRITE (12)                   aa DATA OUT
 850                    WRITE AND VERIFY (12)        ae DATA OUT
 851
 852                    p. 332: Commands for CD-ROM devices (not previously listed)
 853                    PAUSE/RESUME                 4b
 854                    PLAY AUDIO (10)              45
 855                    PLAY AUDIO (12)              a5
 856                    PLAY AUDIO MSF               47
 857                    PLAY TRACK RELATIVE (10)     49
 858                    PLAY TRACK RELATIVE (12)     a9
 859                    READ HEADER                  44
 860                    READ SUB-CHANNEL             42
 861                    READ TOC                     43
 862
 863                    p. 370: Commands for scanner devices (not previously listed)
 864                    GET DATA BUFFER STATUS       34
 865                    GET WINDOW                   25
 866                    OBJECT POSITION              31
 867                    SCAN                         1b
 868                    SET WINDOW                   24 DATA OUT
 869
 870                    p. 391: Commands for optical memory devices (not listed)
 871                    ERASE (10)                   2c
 872                    ERASE (12)                   ac
 873                    MEDIUM SCAN                  38 DATA OUT
 874                    READ DEFECT DATA (12)        b7
 875                    READ GENERATION              29
 876                    READ UPDATED BLOCK           2d
 877                    UPDATE BLOCK                 3d DATA OUT
 878
 879                    p. 419: Commands for medium changer devices (not listed)
 880                    EXCHANGE MEDIUM              46
 881                    INITIALIZE ELEMENT STATUS    07
 882                    MOVE MEDIUM                  a5
 883                    POSITION TO ELEMENT          2b
 884                    READ ELEMENT STATUS          b8
 885                    REQUEST VOL. ELEMENT ADDRESS b5
 886                    SEND VOLUME TAG              b6 DATA OUT
 887
 888                    p. 454: Commands for communications devices (not listed previously)
 889                    GET MESSAGE (6)              08
 890                    GET MESSAGE (10)             28
 891                    GET MESSAGE (12)             a8
 892                  */
 893
 894                 switch (current_SC->cmnd[0]) {
 895                 case CHANGE_DEFINITION:
 896                 case COMPARE:
 897                 case COPY:
 898                 case COPY_VERIFY:
 899                 case LOG_SELECT:
 900                 case MODE_SELECT:
 901                 case MODE_SELECT_10:
 902                 case SEND_DIAGNOSTIC:
 903                 case WRITE_BUFFER:
 904
 905                 case FORMAT_UNIT:
 906                 case REASSIGN_BLOCKS:
 907                 case RESERVE:
 908                 case SEARCH_EQUAL:
 909                 case SEARCH_HIGH:
 910                 case SEARCH_LOW:
 911                 case WRITE_6:
 912                 case WRITE_10:
 913                 case WRITE_VERIFY:
 914                 case 0x3f:
 915                 case 0x41:
 916
 917                 case 0xb1:
 918                 case 0xb0:
 919                 case 0xb2:
 920                 case 0xaa:
 921                 case 0xae:
 922
 923                 case 0x24:
 924
 925                 case 0x38:
 926                 case 0x3d:
 927
 928                 case 0xb6:
 929
 930                 case 0xea:      /* alternate number for WRITE LONG */
 931
 932                         current_SC->SCp.have_data_in = -1;
 933                         outb(0xd0 | PARITY_MASK, TMC_Cntl_port);
 934                         break;
 935
 936                 case 0x00:
 937                 default:
 938
 939                         current_SC->SCp.have_data_in = 1;
 940                         outb(0x90 | PARITY_MASK, TMC_Cntl_port);
 941                         break;
 942                 }
 943         }
 944
 945         if (current_SC->SCp.have_data_in == -1) {       /* DATA OUT */
 946                 while ((data_count = FIFO_Size - inw(FIFO_Data_Count_port)) > 512) {
 947 #if EVERY_ACCESS
 948                         printk("DC=%d, ", data_count);
 949 #endif
 950                         if (data_count > current_SC->SCp.this_residual)
 951                                 data_count = current_SC->SCp.this_residual;
 952                         if (data_count > 0) {
 953 #if EVERY_ACCESS
 954                                 printk("%d OUT, ", data_count);
 955 #endif
 956                                 if (data_count == 1) {
 957                                         Bytes_Written++;
 958
 959                                         outb(*current_SC->SCp.ptr++, Write_FIFO_port);
 960                                         --current_SC->SCp.this_residual;
 961                                 } else {
 962                                         data_count >>= 1;
 963                                         tmp_count = data_count << 1;
 964                                         outsw(Write_FIFO_port, current_SC->SCp.ptr, data_count);
 965                                         current_SC->SCp.ptr += tmp_count;
 966                                         Bytes_Written += tmp_count;
 967                                         current_SC->SCp.this_residual -= tmp_count;
 968                                 }
 969                         }
 970                         if (!current_SC->SCp.this_residual) {
 971                                 if (current_SC->SCp.buffers_residual) {
 972                                         --current_SC->SCp.buffers_residual;
 973                                         ++current_SC->SCp.buffer;
 974                                         current_SC->SCp.ptr = page_address(current_SC->SCp.buffer->page) + current_SC->SCp.buffer->offset;
 975                                         current_SC->SCp.this_residual = current_SC->SCp.buffer->length;
 976                                 } else
 977                                         break;
 978                         }
 979                 }
 980         } else if (current_SC->SCp.have_data_in == 1) { /* DATA IN */
 981                 while ((data_count = inw(FIFO_Data_Count_port)) > 0) {
 982 #if EVERY_ACCESS
 983                         printk("DC=%d, ", data_count);
 984 #endif
 985                         if (data_count > current_SC->SCp.this_residual)
 986                                 data_count = current_SC->SCp.this_residual;
 987                         if (data_count) {
 988 #if EVERY_ACCESS
 989                                 printk("%d IN, ", data_count);
 990 #endif
 991                                 if (data_count == 1) {
 992                                         Bytes_Read++;
 993                                         *current_SC->SCp.ptr++ = inb(Read_FIFO_port);
 994                                         --current_SC->SCp.this_residual;
 995                                 } else {
 996                                         data_count >>= 1;       /* Number of words */
 997                                         tmp_count = data_count << 1;
 998                                         insw(Read_FIFO_port, current_SC->SCp.ptr, data_count);
 999                                         current_SC->SCp.ptr += tmp_count;
1000                                         Bytes_Read += tmp_count;
1001                                         current_SC->SCp.this_residual -= tmp_count;
1002                                 }
1003                         }
1004                         if (!current_SC->SCp.this_residual && current_SC->SCp.buffers_residual) {
1005                                 --current_SC->SCp.buffers_residual;
1006                                 ++current_SC->SCp.buffer;
1007                                 current_SC->SCp.ptr = page_address(current_SC->SCp.buffer->page) + current_SC->SCp.buffer->offset;
1008                                 current_SC->SCp.this_residual = current_SC->SCp.buffer->length;
1009                         }
1010                 }
1011         }
1012
1013         if (done) {
1014 #if EVERY_ACCESS
1015                 printk(" ** IN DONE %d ** ", current_SC->SCp.have_data_in);
1016 #endif
1017
1018 #if ERRORS_ONLY
1019                 if (current_SC->cmnd[0] == REQUEST_SENSE && !current_SC->SCp.Status) {
1020                         if ((unsigned char) (*((char *) current_SC->request_buffer + 2)) & 0x0f) {
1021                                 unsigned char key;
1022                                 unsigned char code;
1023                                 unsigned char qualifier;
1024
1025                                 key = (unsigned char) (*((char *) current_SC->request_buffer + 2)) & 0x0f;
1026                                 code = (unsigned char) (*((char *) current_SC->request_buffer + 12));
1027                                 qualifier = (unsigned char) (*((char *) current_SC->request_buffer + 13));
1028
1029                                 if (key != UNIT_ATTENTION && !(key == NOT_READY && code == 0x04 && (!qualifier || qualifier == 0x02 || qualifier == 0x01))
1030                                     && !(key == ILLEGAL_REQUEST && (code == 0x25 || code == 0x24 || !code)))
1031
1032                                         printk("fd_mcs: REQUEST SENSE " "Key = %x, Code = %x, Qualifier = %x\n", key, code, qualifier);
1033                         }
1034                 }
1035 #endif
1036 #if EVERY_ACCESS
1037                 printk("BEFORE MY_DONE. . .");
1038 #endif
1039                 spin_lock_irqsave(shpnt->host_lock, flags);
1040                 my_done(shpnt, (current_SC->SCp.Status & 0xff)
1041                         | ((current_SC->SCp.Message & 0xff) << 8) | (DID_OK << 16));
1042                 spin_unlock_irqrestore(shpnt->host_lock, flags);
1043 #if EVERY_ACCESS
1044                 printk("RETURNING.\n");
1045 #endif
1046
1047         } else {
1048                 if (current_SC->SCp.phase & disconnect) {
1049                         outb(0xd0 | FIFO_COUNT, Interrupt_Cntl_port);
1050                         outb(0x00, SCSI_Cntl_port);
1051                 } else {
1052                         outb(0x90 | FIFO_COUNT, Interrupt_Cntl_port);
1053                 }
1054         }
1055 #if DEBUG_RACE
1056         in_interrupt_flag = 0;
1057 #endif
1058         return IRQ_HANDLED;
1059 }
1060
1061 static int fd_mcs_release(struct Scsi_Host *shpnt)
1062 {
1063         int i, this_host, irq_usage;
1064
1065         release_region(shpnt->io_port, shpnt->n_io_port);
1066
1067         this_host = -1;
1068         irq_usage = 0;
1069         for (i = 0; i < found; i++) {
1070                 if (shpnt == hosts[i])
1071                         this_host = i;
1072                 if (shpnt->irq == hosts[i]->irq)
1073                         irq_usage++;
1074         }
1075
1076         /* only for the last one */
1077         if (1 == irq_usage)
1078                 free_irq(shpnt->irq, hosts);
1079
1080         found--;
1081
1082         for (i = this_host; i < found; i++)
1083                 hosts[i] = hosts[i + 1];
1084
1085         hosts[found] = NULL;
1086
1087         return 0;
1088 }
1089
1090 static int fd_mcs_queue(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
1091 {
1092         struct Scsi_Host *shpnt = SCpnt->device->host;
1093
1094         if (in_command) {
1095                 panic("fd_mcs: fd_mcs_queue() NOT REENTRANT!\n");
1096         }
1097 #if EVERY_ACCESS
1098         printk("queue: target = %d cmnd = 0x%02x pieces = %d size = %u\n", SCpnt->target, *(unsigned char *) SCpnt->cmnd, SCpnt->use_sg, SCpnt->request_bufflen);
1099 #endif
1100
1101         fd_mcs_make_bus_idle(shpnt);
1102
1103         SCpnt->scsi_done = done;        /* Save this for the done function */
1104         current_SC = SCpnt;
1105
1106         /* Initialize static data */
1107
1108         if (current_SC->use_sg) {
1109                 current_SC->SCp.buffer = (struct scatterlist *) current_SC->request_buffer;
1110                 current_SC->SCp.ptr = page_address(current_SC->SCp.buffer->page) + current_SC->SCp.buffer->offset;
1111                 current_SC->SCp.this_residual = current_SC->SCp.buffer->length;
1112                 current_SC->SCp.buffers_residual = current_SC->use_sg - 1;
1113         } else {
1114                 current_SC->SCp.ptr = (char *) current_SC->request_buffer;
1115                 current_SC->SCp.this_residual = current_SC->request_bufflen;
1116                 current_SC->SCp.buffer = NULL;
1117                 current_SC->SCp.buffers_residual = 0;
1118         }
1119
1120
1121         current_SC->SCp.Status = 0;
1122         current_SC->SCp.Message = 0;
1123         current_SC->SCp.have_data_in = 0;
1124         current_SC->SCp.sent_command = 0;
1125         current_SC->SCp.phase = in_arbitration;
1126
1127         /* Start arbitration */
1128         outb(0x00, Interrupt_Cntl_port);
1129         outb(0x00, SCSI_Cntl_port);     /* Disable data drivers */
1130         outb(adapter_mask, SCSI_Data_NoACK_port);       /* Set our id bit */
1131         in_command = 1;
1132         outb(0x20, Interrupt_Cntl_port);
1133         outb(0x14 | PARITY_MASK, TMC_Cntl_port);        /* Start arbitration */
1134
1135         return 0;
1136 }
1137
1138 #if DEBUG_ABORT || DEBUG_RESET
1139 static void fd_mcs_print_info(Scsi_Cmnd * SCpnt)
1140 {
1141         unsigned int imr;
1142         unsigned int irr;
1143         unsigned int isr;
1144         struct Scsi_Host *shpnt = SCpnt->host;
1145
1146         if (!SCpnt || !SCpnt->host) {
1147                 printk("fd_mcs: cannot provide detailed information\n");
1148         }
1149
1150         printk("%s\n", fd_mcs_info(SCpnt->host));
1151         print_banner(SCpnt->host);
1152         switch (SCpnt->SCp.phase) {
1153         case in_arbitration:
1154                 printk("arbitration ");
1155                 break;
1156         case in_selection:
1157                 printk("selection ");
1158                 break;
1159         case in_other:
1160                 printk("other ");
1161                 break;
1162         default:
1163                 printk("unknown ");
1164                 break;
1165         }
1166
1167         printk("(%d), target = %d cmnd = 0x%02x pieces = %d size = %u\n", SCpnt->SCp.phase, SCpnt->device->id, *(unsigned char *) SCpnt->cmnd, SCpnt->use_sg, SCpnt->request_bufflen);
1168         printk("sent_command = %d, have_data_in = %d, timeout = %d\n", SCpnt->SCp.sent_command, SCpnt->SCp.have_data_in, SCpnt->timeout);
1169 #if DEBUG_RACE
1170         printk("in_interrupt_flag = %d\n", in_interrupt_flag);
1171 #endif
1172
1173         imr = (inb(0x0a1) << 8) + inb(0x21);
1174         outb(0x0a, 0xa0);
1175         irr = inb(0xa0) << 8;
1176         outb(0x0a, 0x20);
1177         irr += inb(0x20);
1178         outb(0x0b, 0xa0);
1179         isr = inb(0xa0) << 8;
1180         outb(0x0b, 0x20);
1181         isr += inb(0x20);
1182
1183         /* Print out interesting information */
1184         printk("IMR = 0x%04x", imr);
1185         if (imr & (1 << shpnt->irq))
1186                 printk(" (masked)");
1187         printk(", IRR = 0x%04x, ISR = 0x%04x\n", irr, isr);
1188
1189         printk("SCSI Status      = 0x%02x\n", inb(SCSI_Status_port));
1190         printk("TMC Status       = 0x%02x", inb(TMC_Status_port));
1191         if (inb(TMC_Status_port) & 1)
1192                 printk(" (interrupt)");
1193         printk("\n");
1194         printk("Interrupt Status = 0x%02x", inb(Interrupt_Status_port));
1195         if (inb(Interrupt_Status_port) & 0x08)
1196                 printk(" (enabled)");
1197         printk("\n");
1198         if (chip == tmc18c50 || chip == tmc18c30) {
1199                 printk("FIFO Status      = 0x%02x\n", inb(shpnt->io_port + FIFO_Status));
1200                 printk("Int. Condition   = 0x%02x\n", inb(shpnt->io_port + Interrupt_Cond));
1201         }
1202         printk("Configuration 1  = 0x%02x\n", inb(shpnt->io_port + Configuration1));
1203         if (chip == tmc18c50 || chip == tmc18c30)
1204                 printk("Configuration 2  = 0x%02x\n", inb(shpnt->io_port + Configuration2));
1205 }
1206 #endif
1207
1208 static int fd_mcs_abort(Scsi_Cmnd * SCpnt)
1209 {
1210         struct Scsi_Host *shpnt = SCpnt->device->host;
1211
1212         unsigned long flags;
1213 #if EVERY_ACCESS || ERRORS_ONLY || DEBUG_ABORT
1214         printk("fd_mcs: abort ");
1215 #endif
1216
1217         spin_lock_irqsave(shpnt->host_lock, flags);
1218         if (!in_command) {
1219 #if EVERY_ACCESS || ERRORS_ONLY
1220                 printk(" (not in command)\n");
1221 #endif
1222                 spin_unlock_irqrestore(shpnt->host_lock, flags);
1223                 return FAILED;
1224         } else
1225                 printk("\n");
1226
1227 #if DEBUG_ABORT
1228         fd_mcs_print_info(SCpnt);
1229 #endif
1230
1231         fd_mcs_make_bus_idle(shpnt);
1232
1233         current_SC->SCp.phase |= aborted;
1234
1235         current_SC->result = DID_ABORT << 16;
1236
1237         /* Aborts are not done well. . . */
1238         my_done(shpnt, DID_ABORT << 16);
1239
1240         spin_unlock_irqrestore(shpnt->host_lock, flags);
1241         return SUCCESS;
1242 }
1243
1244 static int fd_mcs_bus_reset(Scsi_Cmnd * SCpnt) {
1245         struct Scsi_Host *shpnt = SCpnt->device->host;
1246         unsigned long flags;
1247
1248 #if DEBUG_RESET
1249         static int called_once = 0;
1250 #endif
1251
1252 #if ERRORS_ONLY
1253         if (SCpnt)
1254                 printk("fd_mcs: SCSI Bus Reset\n");
1255 #endif
1256
1257 #if DEBUG_RESET
1258         if (called_once)
1259                 fd_mcs_print_info(current_SC);
1260         called_once = 1;
1261 #endif
1262
1263         spin_lock_irqsave(shpnt->host_lock, flags);
1264
1265         outb(1, SCSI_Cntl_port);
1266         do_pause(2);
1267         outb(0, SCSI_Cntl_port);
1268         do_pause(115);
1269         outb(0, SCSI_Mode_Cntl_port);
1270         outb(PARITY_MASK, TMC_Cntl_port);
1271
1272         spin_unlock_irqrestore(shpnt->host_lock, flags);
1273
1274         /* Unless this is the very first call (i.e., SCPnt == NULL), everything
1275            is probably hosed at this point.  We will, however, try to keep
1276            things going by informing the high-level code that we need help. */
1277                 return SUCCESS;
1278 }
1279
1280 #include <scsi/scsi_ioctl.h>
1281
1282 static int fd_mcs_biosparam(struct scsi_device * disk, struct block_device *bdev,
1283                             sector_t capacity, int *info_array)
1284 {
1285         unsigned char *p = scsi_bios_ptable(bdev);
1286         int size = capacity;
1287
1288         /* BIOS >= 3.4 for MCA cards */
1289         /* This algorithm was provided by Future Domain (much thanks!). */
1290
1291         if (p && p[65] == 0xaa && p[64] == 0x55 /* Partition table valid */
1292             && p[4]) {  /* Partition type */
1293                 /* The partition table layout is as follows:
1294
1295                    Start: 0x1b3h
1296                    Offset: 0 = partition status
1297                    1 = starting head
1298                    2 = starting sector and cylinder (word, encoded)
1299                    4 = partition type
1300                    5 = ending head
1301                    6 = ending sector and cylinder (word, encoded)
1302                    8 = starting absolute sector (double word)
1303                    c = number of sectors (double word)
1304                    Signature: 0x1fe = 0x55aa
1305
1306                    So, this algorithm assumes:
1307                    1) the first partition table is in use,
1308                    2) the data in the first entry is correct, and
1309                    3) partitions never divide cylinders
1310
1311                    Note that (1) may be FALSE for NetBSD (and other BSD flavors),
1312                    as well as for Linux.  Note also, that Linux doesn't pay any
1313                    attention to the fields that are used by this algorithm -- it
1314                    only uses the absolute sector data.  Recent versions of Linux's
1315                    fdisk(1) will fill this data in correctly, and forthcoming
1316                    versions will check for consistency.
1317
1318                    Checking for a non-zero partition type is not part of the
1319                    Future Domain algorithm, but it seemed to be a reasonable thing
1320                    to do, especially in the Linux and BSD worlds. */
1321
1322                 info_array[0] = p[5] + 1;       /* heads */
1323                 info_array[1] = p[6] & 0x3f;    /* sectors */
1324         } else {
1325                 /* Note that this new method guarantees that there will always be
1326                    less than 1024 cylinders on a platter.  This is good for drives
1327                    up to approximately 7.85GB (where 1GB = 1024 * 1024 kB). */
1328                 if ((unsigned int) size >= 0x7e0000U)
1329                 {
1330                         info_array[0] = 0xff;   /* heads   = 255 */
1331                         info_array[1] = 0x3f;   /* sectors =  63 */
1332                 } else if ((unsigned int) size >= 0x200000U) {
1333                         info_array[0] = 0x80;   /* heads   = 128 */
1334                         info_array[1] = 0x3f;   /* sectors =  63 */
1335                 } else {
1336                         info_array[0] = 0x40;   /* heads   =  64 */
1337                         info_array[1] = 0x20;   /* sectors =  32 */
1338                 }
1339         }
1340         /* For both methods, compute the cylinders */
1341         info_array[2] = (unsigned int) size / (info_array[0] * info_array[1]);
1342         kfree(p);
1343         return 0;
1344 }
1345
1346 static Scsi_Host_Template driver_template = {
1347         .proc_name                      = "fd_mcs",
1348         .proc_info                      = fd_mcs_proc_info,
1349         .detect                         = fd_mcs_detect,
1350         .release                        = fd_mcs_release,
1351         .info                           = fd_mcs_info,
1352         .queuecommand                   = fd_mcs_queue,
1353         .eh_abort_handler               = fd_mcs_abort,
1354         .eh_bus_reset_handler           = fd_mcs_bus_reset,
1355         .bios_param                     = fd_mcs_biosparam,
1356         .can_queue                      = 1,
1357         .this_id                        = 7,
1358         .sg_tablesize                   = 64,
1359         .cmd_per_lun                    = 1,
1360         .use_clustering                 = DISABLE_CLUSTERING,
1361 };
1362 #include "scsi_module.c"